Primer for gasolene-engines.



C. A. BROOKS & E. G. KINLEY.

PRIMER FOR GASOLENE ENGINES.

APPLICATION IILBD APR. 5,

Patented Sept. 2, 1913.

Inventors wdm/a wr/ iW/ WiI'n ess es (566. Mew/Q, ///@%M TED STATES PATENT FFTGE.

CLAUDE A. BROOKS AND EVAN G. KINLEY, 0F TOPEKA, KANSAS.

PRIMER FOR GASOLENE-ENGINES.

Specification of Letters Patent.

Application filed April 5, 1912.

PatentedSept.2,1913. Serial No. 688,631.

To all whom it may concern Be it known that we, CLAUDE A. Bnoons and EVAN Gr. KINLny, citizens of the United States, residing at Topeka, in the county of Shawnee and State of Kansas, have invented certain new and useful Improvements in Primers for Gasolene-Engines, of which the following is a specification.

()ur invention relates to primers to be used for starting gasolenc engines.

It is a well known fact that much cranking is usually required in order to secure a proper supply of gas from the carburetor, in starting, especially in cold weather; principally on account of the carburetor being located some distance from the intake valves and on account of the first suction in the operation of the pistons taking in only air.

lVe are aware that attempts have been made in various ways to prime the cylinder or the inlet pipe with gasolene; but in our invention, we provide a primer comprising a tube entering through the wall of the inlet pipe and terminating in a spray nozzle in the mixing chamber immediately under and adjacent to the intake valve. By this arrangement, we prevent undue flooding of the cylinder with the gasolenc or gas, and insure a proper mixture of the gas and the air coming in initially through the inlet pipe, on the initial suction of the cylinder.

In the drawing accompanying and forming part of this specification and in the description of the drawing, we have shown our invention in its preferred form, and have shown what we deem to be the best mode of applying the principles thereof; but it is to be understood that, within the scope of the appended claims, we contemplate changes in form, proportions, and materials, the transposition of parts, and the substitution of equivalent members, without departing from the spirit of our invention.

The drawing is a vertical sectional elevation of a single cylinder of a gasolene en gine, showing also the intake valve, the mixing chamber under the valve, and the inlet pipe leading from the carburetor to the mixing chamber, with our priming device applied thereto.

1 is the casing for the cylinders and water circulation, 2 is one of the cylinders, 3 is the cylinder head, 4 is the mixing chamber under the intake valve 5, 6 is the valve stem, 7

is the intake or inlet pipe, also called the manifold in multiple cylinder engines, leading them the carburetor to the mixing chamher. This much is old in the art.

'lhrough the wall of the inlet pipe at the top of the elbow 8, where the inlet pipe turns from vertical to horizontal disposition, we insert a small tube 9, through a suitable lmshing 14, which lube cxtcmls into the mixing chamber, having an inward and upward bend and terminating in a spray nozzle 10 immediately adj accnt to and below the intake valve. The tube leads, as indicated somewhat diagrainmatically at 11, from a small tank 12, from which the gasolene flows to the nozzle by gravity. The tube is provided with a cook 13. Normally, the cock 13 is closed, so that no gasolene is furnished to the engine through the tube t). in starting the engine, the cock is opened momentarily, but only long enough to permit a small supply of gasolcnc to ilow into the tube or to permit the gasolene to overflow the tube, the surplus droppinginto the mixing chamber below the valve. Now, the first suction from the cylinder will draw a mixture of the air which is in the inlet pipe and the gas from the gasolenc with which the mixing chamber has been primed, in just about the same proportions as they are normally drawn from the carburetor, and the charge so drawn into the cylinder will burn from the first spark. In this connection, we desire to state that this mixture is not secured when the gasolene is introduced into the cylimlcr initially for priming, as the mixture may be too rich or too weak. Nor, on the other hand, is priming in the inlet pipe sullicicnt to insure starting on the first charge, since even in such case, it

may require more than the first charge to secure the proper mixture. But by introducing the priming charge into the mixing chamber and immediately adjacent to the intake valve, we are certain that the very first charge drawn in through the intake valve will start the engine, as the surplus gasolcne let in through the priming tube if there be any surplus, will not flood the cylinder or the valve, and the whirling motion induced by the suction through the intake valve will draw in both air and .gas and at the same time mix the same thoroughly.

lVhile we have shown our primer applied to a single cylinder, it is to be understood that it may be applied as Well to multipleof intake valves; and in any case a single tank and cock may be used with branch tubes leading to each primer. It is also to be understood that the ordinary priming charge let into the tube or overflowing into the mixing chamber willbe sufiicient to charge the cylinder many times, and to keep the engine running long enough to secure the drawing of a proper mixture from the carbureter. It will also he therefore further understood that where a primary or storage battery is used or available for the sparking, the engine may be frequently started by turning on the spark, having charged the mixing chamber first. This would occur where the engine had stopped with any of its cylinders charged and in position for sparking, as the explosion in any one of multiple cylinders equipped with our primer, would insure running the engine until the carbureter would furnish the proper mixture, even under unfavorable conditions.

What we claim is:

1. The combination with a casing having a cylinder and a mixing chamber, an intake valve above the mixing chamber, and an inlet pipe leading from the carbureter to the mixing chamber and having an elbow close to the point of junction with the mixing chamber, of a tube passing through the wall of the inlet pipe on top of the elbow and having an inward and upward bend and terminating in a spray nozzle in the mixing chamber and immediately adjacent to and below the intake valve, a supply tank located at a higher level than the nozzle and connected with said tube, and a cock for controlling the flow through said tube.

2. In a gasolene engine, the combination with a cylinder, a mixing chamber under the intake valve, said intake valve, and an inlet pipe leading from the carbureter to the mixing chamber, of a priming tube passing through the wall of the inlet pipe and having aninward and upward bend and terminating in a spray nozzle within the mixing chamber and adjacent to and below the intake valve, a supply tank located at a higher level than said nozzle and connected with said priming tube, and a cock for controlling the'flow in said tube.

3. In a gasolene engine, the combination with a cylinder, a mixing chamber, an intake valve above the bottom of the mixing chamber, and an inlet pipe leading into said mixing chamber, of a priming tube passing through the wall of the inlet pipe and passing into and terminating with an upward bend and a spray nozzle within the mixing chamber and adjacent to said valve,

a source of supply for said tube, and a means 7 for controlling said supply.

4. In a gasolene engine, the combination with a cylinder, a mixing chamber, an intake valve above the bottom 01": the mixing chamber, and an inlet pipe leading into the mixing'chamber, of a priming tube passing into said mixing chamber and terminating in an upward bend and with a spray nozzle adjacent to said valve.

5. In a gasolene engine, the combination carbureter with the mixing chamber, of a .30 with an inlet pipe adapted to connect the tube passing through the wall of said pipe and having an upward bend projecting beyond the end of the pipe, which end is adaptthe pipe is applied to the engine casing.

In testimony whereof we have atlixed our signatures in presence of two witnesses.

CLAUDE A. BROOKS. .EVAN G. KINLEY. Witnesses: I

E. A. CLARKE, J. M. STARK.

uopies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

Washington, I). G.

.85 ed to be adjacent to the intake valve when 

